Viessmann VITOTRONIC300 Installation And Service Instructions Manual page 95

Vitotronic 300, GW2B Installation and Service
"Heating Circuit 1", "Heating Circuit 2", "Heating Circuit 3" Group
Parameter address b5:...
1
2
3
4
5
6
7
8
Coding in the factory set condition
Min. supply temperature heating circuit
C5:20 Electronic minimum supply temperature limit
68°F (20°C) (only in operation at standard
room temperature).
Max. supply temperature heating circuit
C6:75 Electronic maximum supply temperature limit
set to 167°F (75°C).
Heating program - changeover
d5:0 With external heating program changeover
(observe setting for coding addresses "5d",
"5E" and "5F" in the "General" group).
Heating program switches to "Constant central
heating with reduced room temperature" or
"Standby mode" (subject to the settings of the
set reduced room temperature).
External heating program changeover to heating circuit
d8:0 No heating program changeover via extension
EA1.
With heating circuit pump logic function:
Heating circuit pump "OFF"
RT > RT + 5 K
actual set
RT > RT + 4 K
actual set
RT > RT + 3 K
actual set
RT > RT + 2 K
actual set
RT > RT + 1 K
actual set
RT > RT
actual set
RT > RT - 1 K
actual set
RT > RT - 2 K
actual set
Possible change
C5:1
to
C5:127
C6:10
to
C6:127
d5:1
d8:1
d8:2
d8:3
Heating circuit pump "ON"
RT < RT
actual set
RT < RT
actual set
RT < RT
actual set
RT < RT
actual set
RT < RT
actual set
RT < RT
actual set
RT < RT
actual set
RT < RT
actual set
Minimum limit adjustable from 34 to 261°F
(1 to 127°C) (limited by boiler-specific
parameters).
Maximum limit adjustable from 50 to 261°F
(10 to 127°C) (limited by boiler-specific
parameters).
The heating program changes to "Constant
operation with standard room temperature".
Heating program changeover via input DE1
at extension EA1.
Heating program changeover via input DE2
at extension EA1.
Heating program changeover via input DE3
at extension EA1.
Code 1
(continued)
+ 4 K
+ 3 K
+ 2 K
+ 1 K
- 1 K
- 2 K
- 3 K
95